Currently my object is moving constantly when i hold down whichever arrow key. How do I make it move a set distance each time it is pressed?
Thanks
mullac51 wrote ...
2014/11/6
Help moving 1 tile at a time.
You can use either 'move' or 'setLocation'. Do I get it right that you want the object to move just once instead of constantly when a arrow key is hit?
So if you're holding down an arrow the object will still move only once instead of as long as the arrow key gets pressed?
The best way is to add an instance boolean field to the class, similar to how firing was described at the bottom of this discussion page. You will, however, need to use a combination of checks (one for each key):
// with instance boolean field
private boolean directionKeyDown; // initial default value is 'false'
// in act or method it calls
boolean leftDown = Greenfoot.isKeyDown("left");
boolean rightDown = Greenfoot.isKeyDown("right");
boolean upDown = Greenfoot.isKeyDown("up");
boolean downDown = Greenfoot.isKeyDown("down");
if (directionKeyDown != (leftDown || rightDown || upDown || downDown) &&
(directionKeyDown = !directionKeyDown))
{
int dx = 0, dy = 0;
if (rightDown) dx++;
if (leftDown) dx--;
if (upDown) dy--;
if (downDown) dy++;
setLocation(getX()+dx, getY()+dy);
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